亲油重晶石的研制及应用  

PREPARATION AND APPLICATIONS OF OLEOPHILIC MODIFIED BARITE

作　　者：沈伟[1,2] 潘惠芳[1,2] 杜通林 贾铎 

机构地区：[1]中国海洋石油总公司 [2]石油大学化工学部

出　　处：《石油大学学报（自然科学版）》1998年第1期66-69,共4页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：从重晶石的表面结构和特征入手，优选了ＳＥ系列活化剂，并对重晶石表面进行了化学改性，使其表面呈亲油性。这样，在油基液中重晶石颗粒表面易形成一定厚度的油膜，提高了其在油基钻井液中的分散度，减少了聚结沉降，从而大大改善了重晶石加重油基钻井液的动力稳定性。与普通重晶石加重的油基钻井液相比，ＳＥ系列活化重晶石加重的油基钻井液经８０℃和１６ｈ老化后的密度差降低５０％以上，其动力稳定性大大增强，而且流变性能得到了改善。Several oleophilic modified agents were selected to modify the barite surface from hydrophilicity to oleophilicity. There is a strong interaction between barite and chemical modifier,so that the suspending power of barite in oil based drilling fluid is improved.The oleophilic modified barite (OMB) was applied in oil based mud.The result shows that,not only is the dynamical stability of the weighed oil based mud enhanced,but also the rheological properties are improved.The OMB can be used in inverted oil mud in which the diesel oil or less toxic oil can be used as a successive phase.

关 键 词：重晶石 活化 稳定性 流变性 钻井液 

分 类 号：TE254.4[石油与天然气工程—油气井工程]